Electric fan



FIG. 1 is a front elevational view of an electric fan showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right side elevational view thereof, the left side being a mirror image;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a top, left front perspective view thereof, and

FIG. 7 is a top, right rear perspective view thereof, taken from the top. 

The ornamental design for an electric fan, as shown and described. 